package person;

public class Demo02 {
    private int age;
    public void setAge(int age){
        if (age >=0 && age <= 100){

            System.out.println("年龄不合法");
        }
        else {
            this.age = age;
        }
    }

    public static void main(String[] args) {
        Demo02 n = new Demo02();
        n.setAge(50);
    }




}
